On the afternoon of July 6th, commissioned by the Science and Technology Department of Fujian Province, Fujian Metallurgical (Holdings) Co., Ltd. organized relevant experts to undertake the Fujian Province's industrial guiding (key) project of Nanluo Co., Ltd. "Toughening process test study" (No. 2014H0013) for project acceptance. The expert group heard the project implementation report, reviewed the materials, examined the site, and discussed and questioned that the project met the technical and economic indicators specified in the mission statement. The project team submitted complete acceptance data that met the acceptance requirements and the expert group agreed. Agreed to pass the acceptance, and proposed to further increase the promotion and application of industrialization.
Cold Drawn Steel Bar is produced by hot rolled steel bar or wire rod to get smooth surface, more precision size, higher mechanical properties, which improves machining characteristics. It can also get various sections and sizes. So cold drawn steel bar is a better choice for machining users.
According to different steel grade, the production line is usually different. The Basic production line is as below:
For high carbon steel or alloy steel bars, to avoid the cracks in inner or surface, the bars are usually required to be annealed before cold drawing.
To get different mechanical properties or hardness depending on final usage, the cold drawn bars will also be heat treated such as annealed, normalized or quenched and tempered(Q&T).
For CNC machines usage, to get much more precision sizes or much more better surface roughness for chrome plating, the cold drawn steel bars can also be centerless ground or polished.
We have more advantages on producing cold drawn steel bars:
1) Big stocks of hot rolled round bars or wire rods as raw materials
2) Wide range of cold drawn steel bar sizes: from 10mm to 150mm
3) Different cold drawing medias powder or oil to get different surface
4) Straightening machines to get better straightness up to 0.5mm/m
5) Grinding and polishing machines to get better roughness upto 0.4um
6) Heat treating furnaces to adjust the mechanical properties
7) Full sets of testing equipment to test the sizes, mechanical properties and microstructure.
8) Multiple packages to avoid broken packages and anti-rusty
Cold Drawn Steel Bar
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SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.lerenspecialsteel.com